Long-Term Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2019

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Amount of Compensation Expense Recognized

The following table summarizes the amount of recognized compensation expense associated with the MIP and Directors Compensation Plan, which are reflected in the accompanying Unaudited Condensed Statements of Consolidated Operations for the periods presented (in thousands):

	For the Three Months Ended					For the Six Months Ended
	June 30,					June 30,
	2019		2018			2019		2018
Equity classified awards
TSUs	$	532	$	(837	)	$	1,202	$	111
PSUs		309		251			705		251
Board RSUs		50		35			162		54
Restricted stock options		—		(134	)		—		75
	$	891	$	(685	)	$	2,069	$	491

2017 Non-Employee Directors Compensation Plan [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Information Regarding Restricted Stock Unit Awards

The following table summarizes information regarding the Board RSUs granted under the Directors Compensation Plan for the period presented:

				Weighted-
				Average Grant
	Number of			Date Fair Value
	Units			per Unit (1)
Board RSUs outstanding at December 31, 2018		39,604		$	11.36
Granted (2)		42,933		$	6.95
Forfeited		—		$	—
Vested		(21,617	)	$	11.57
Board RSUs outstanding at June 30, 2019		60,920		$	8.18

(1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.

(2) The aggregate grant date fair value of Board RSUs issued for the six months ended June 30, 2019 was $0.3 million based on grant date market price of $6.95 per share.

TSUs [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Information Regarding Restricted Stock Unit Awards

The following table summarizes information regarding the TSUs granted under the MIP for the period presented:

				Weighted-
				Average Grant
	Number of			Date Fair Value
	Units			per Unit (1)
TSUs outstanding at December 31, 2018		598,024		$	11.35
Granted (2)		281,085		$	6.92
Forfeited		(38,151	)	$	11.13
Vested		(391,321	)	$	8.66
TSUs outstanding at June 30, 2019		449,637		$	10.94

(1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.

(2) The aggregate grant date fair value of TSUs issued for the six months ended June 30, 2019 was $1.9 million based on a grant date market price ranging from $6.90 to $8.70 per share.

PSUs [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Information Regarding Restricted Stock Unit Awards

The following table summarizes information regarding the PSUs granted under the MIP for the period presented:

				Weighted-
				Average Grant
	Number of			Date Fair Value
	Units			per Unit (1)
PSUs outstanding at December 31, 2018		393,500		$	8.14
Granted (2)		11,500		$	5.12
Forfeited		(22,750	)	$	7.59
Vested		—		$	—
PSUs outstanding at June 30, 2019		382,250		$	8.08

(1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.

(2) The aggregate grant date fair value of PSUs issued for the six months ended June 30, 2019 was less than $0.1 million based on a calculated fair value price ranging from $2.80 to $6.76 per share.

Schedule of Fair Value Assumptions for PSUs

A Monte Carlo simulation was used in order to determine the fair value of these awards at the grant date.

The assumptions used to estimate the fair value of the PSUs are as follows:

Share price targets	$	12.50		$	15.00		$	17.50
Risk-free interest rate:
Awards Issued on January 1, 2019		2.44	%		2.44	%		2.44	%
Awards Issued on April 1, 2019		2.28	%		2.28	%		2.28	%
Dividend yield		—			—			—
Expected volatility:
Awards Issued on January 1, 2019		54.0	%		54.0	%		54.0	%
Awards Issued on April 1, 2019		50.0	%		50.0	%		50.0	%
Calculated fair value per PSU:
Awards Issued on January 1, 2019	$	6.76		$	5.86		$	5.11
Awards Issued on April 1, 2019	$	4.22		$	3.43		$	2.80